اراﺋﻪ راهﮐﺎر ﺑﻬﺒﻮد ﻣﺠﻤﻮع ﻧﺮخ اﻣﻦ در ﺷﺒﮑﻪ ﻧﺴﻞ ﭘﻨﺠﻢ ﺑﺎ اﺳﺘﻔﺎده از روش ﻣﺸﺎرﮐﺖ ﮐﺎرﺑﺮان ﻗﺎﻧﻮﻧﯽ ﺷﺒﮑﻪ و ﺑﻬﺮهﮔﯿﺮي از روش ﺻﻔﺤﺎت ﺑﺎزﺗﺎﺑﻨﺪه ﻫﻮﺷﻤﻨﺪ و دﺳﺘﺮﺳﯽ ﭼﻨﺪﮔﺎﻧﻪ ﻧﺎﻣﺘﻌﺎﻣﺪ

A solution to Secrecy Sum Rate Enhancement in 5G Networks Using IRS and NOMA by Cooperative Legal Users

ﻫﺪف اﯾﻦ ﻣﻘﺎﻟﻪ اراﺋﻪ راهﮐﺎر ﺑﻬﺒﻮد و اﻓﺰاﯾﺶ ﻣﺠﻤﻮع ﻧﺮخ اﻣﻦ در ﻻﯾﻪ ﻓﯿﺰﯾﮑﯽ ﺑﺮاي ﺷﺒﮑﻪ ﻣﺨﺎﺑﺮات ﺑﯽﺳﯿﻢ اﺳﺖ ﮐﻪ از ﻓﻨﺎوريﻫﺎي ﻣﺨﺘﻠﻔﯽ ﻣﺎﻧﻨﺪ روش دﺳﺘﺮﺳﯽ ﭼﻨﺪﮔﺎﻧﻪ ﻧﺎﻣﺘﻌﺎﻣﺪ، ﺻﻔﺤﺎت ﺑﺎزﺗﺎﺑﻨﺪه ﻫﻮﺷﻤﻨﺪ و ارﺗﺒﺎﻃﺎت دﺳﺘﮕﺎه ﺑﻪ دﺳﺘﮕﺎه و ﻣﺸﺎرﮐﺖ ﮐﺎرﺑﺮان ﺑﻪﻋﻨﻮان ﻫﻤﯿﺎر ﺷﺒﮑﻪ در اﻧﺘﻘﺎل دﯾﺘﺎ، ﺑﻬﺮه ﻣﯽﺑﺮد. ﻣﺪل ﺳﯿﺴﺘﻢ ﭘﯿﺸﻨﻬﺎدي ﺑﺮاي اﯾﻦ ﻣﻘﺎﻟﻪ ﺷﺎﻣﻞ ﯾﮏ اﯾﺴﺘﮕﺎه ﻓﺮﺳﺘﻨﺪه ﭘﺎﯾﻪ، ﯾﮏ ﺻﻔﺤﻪ ﺑﺎزﺗﺎﺑﻨﺪه، دو ﮐﺎرﺑﺮ ﻗﺎﻧﻮﻧﯽ، ﯾﮏ ﺷﻨﻮدﮔﺮ اﺳﺖ و ﺑﻪ دﻟﯿﻞ وﺟﻮد ﻣﻮاﻧﻊ ﺑﺴﯿﺎر در ﻣﺤﯿﻂ اﻧﺘﻘﺎل اﻣﮑﺎن وﺟﻮد دﯾﺪ ﻣﺴﺘﻘﯿﻢ ﺑﯿﻦ ﮐﺎرﺑﺮان و اﯾﺴﺘﮕﺎه ﭘﺎﯾﻪ در ﺷﺒﮑﻪ وﺟﻮد ﻧﺪارد و اﻧﺘﻘﺎل داده از ﻃﺮﯾﻖ ﺻﻔﺤﺎت ﺑﺎزﺗﺎﺑﻨﺪه و ﻫﻤﯿﺎري ﮐﺎرﺑﺮان ﺷﺒﮑﻪ اﻣﮑﺎن ﭘﺬﯾﺮ اﺳﺖ. راهﮐﺎر اراﺋﻪ ﺷﺪه ﺑﺮاي اﻓﺰاﯾﺶ ﻧﺮخ اﻣﻦ در ﻻﯾﻪ ﻓﯿﺰﯾﮑﯽ ﺑﺎ ﻓﺮض ﻣﺸﺨﺺ ﺑﻮدن ﻣﻮﻗﻌﯿﺖ ﻣﮑﺎﻧﯽ ﺗﻤﺎﻣﯽ اﺟﺰاي ﺷﺒﮑﻪ، ﺑﺎ اﺳﺘﻔﺎده از روشﻫﺎي ﺑﻬﯿﻨﻪ و ﻏﯿﺮﺑﻬﯿﻨﻪ، ﺑﻪﺻﻮرت ﻋﺒﺎرت ﻓﺮم ﺑﺴﺘﻪ ﻣﺤﺎﺳﺒﻪ ﺷﺪه اﺳﺖ. ﻣﻘﺪار ﻧﺮخ اﻣﻦ ﻣﺘﻨﺎﺳﺐ ﺑﺎ راهﮐﺎر اراﺋﻪ ﺷﺪه، ﺑﺮاي ﻣﻘﺎدﯾﺮ ﻣﺨﺘﻠﻒ ﺗﻮان ﻓﺮﺳﺘﻨﺪه اﯾﺴﺘﮕﺎه ﭘﺎﯾﻪ، ﺟﺎﺑﺠﺎﯾﯽ ﻣﮑﺎﻧﯽ ﺷﻨﻮدﮔﺮ در ﺷﺒﮑﻪ، ﺗﻐﯿﯿﺮ ﺗﻌﺪاد آراﯾﻪﻫﺎي ﺻﻔﺤﺎت ﻫﻮﺷﻤﻨﺪ و ﺗﻐﯿﯿﺮ ﺗﻌﺪاد آﻧﺘﻦﻫﺎي اﯾﺴﺘﮕﺎه ﭘﺎﯾﻪ ﺑﻪدﺳﺖ آﻣﺪه اﺳﺖ. ﻧﺘﺎﯾﺞ ﻋﺪدي ﺑﻪدﺳﺖ آﻣﺪه اﺛﺮﺑﺨﺸﯽ راهﮐﺎر ﭘﯿﺸﻨﻬﺎدي را ﺗﺄﯾﯿﺪ ﻣﯽﮐﻨﺪ و ﻧﺸﺎن ﻣﯽدﻫﺪ اﻓﺰاﯾﺶ ﺗﻌﺪاد آراﯾﻪﻫﺎي ﺻﻔﺤﺎت ﺑﺎزﺗﺎﺑﻨﺪه، ﻣﻘﺪار ﻧﺮخ اﻣﻦ را ﺑﻪ دﻟﯿﻞ اﺛﺮ ﻣﺘﻤﺮﮐﺰ ﻧﻤﻮدن اﻧﺘﺸﺎر ﭘﺮﺗﻮ ﺳﯿﮕﻨﺎل ﺑﺮ روي ﮐﺎرﺑﺮ ﺑﻪ ﻣﯿﺰان ﻗﺎﺑﻞ ﺗﻮﺟﻪ اﻓﺰاﯾﺶ ﻣﯽدﻫﺪ. ﻫﻤﭽﻨﯿﻦ ﻧﺘﺎﯾﺞ ﺷﺒﯿﻪﺳﺎزي ﻧﺸﺎن دﻫﻨﺪه اﻓﺰاﯾﺶ 50 درﺻﺪي ﻣﺠﻤﻮع ﻧﺮخ اﻣﻦ ﺑﺮاي ﺷﺒﮑﻪ در ﺣﺎﻟﺖ اﺳﺘﻔﺎده از روش دﺳﺘﺮﺳﯽ ﻧﺎﻣﺘﻌﺎﻣﺪ در ﻣﻘﺎﯾﺴﻪ ﺑﺎ روش دﺳﺘﺮﺳﯽ ﻣﺘﻌﺎﻣﺪ اﺳﺖ

The use of new physical layer security approaches such as intelligent reflective surfaces as well as the use of existing capabilities in the mobile network such as the participation of network users as network partners are solutions that can be very effective in the next generation of mobile telecommunications to improve and increase the total Secrecy Rate in the physical layer.The proposed solution for improving the secrecy rate of the transmitted signal in the physical layer performed by closed-form solution to the described system. In this paper, we analyzed a network consisting of a gNB, two users, an IRS and an eavesdropper in an environment full of obstacles. Using Simulations, we evaluate our solution mathematically and investigate the effect of the eavesdropper location on the total secrecy rate. Also, the analysis and simulation of secrecy rate for the proposed network is performed by taking into account practical network considerations such as changing the location of the Eavesdropper in the network. In addition, the impact of changing the number of elements of smart surface arrays has been analyzed. The numerical results reveal that increasing IRS elements can enhance the ergodic secrecy rate, the reason is that increasing of IRS elements can focuses the main beam of data signal on the first user which increase secrecy rate. Finally, we compare the performance of the OMA and NOMA techniques in the proposed system model. We show that the NOMA technique provides 50% more ergodic secrecy rate compared to the OMA technique.